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Book: Harley-Davidson Knucklehead: 80 Years - Motorbooks

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Harley Knucklehead Rocker Box Popular Q&A

Q: How to Replace Harley Rocker Boxes.
A: 1. Drain the fuel tank. Remove the fuel tank mounting bolts. Turn the fuel petcock to the "Off" position and remove the fuel line and vaccuum line from the petc... Read More »

Q: How to Change Rocker Box Gaskets on the Harley Evolution.
A: 1. Park your Harley in a well-ventilated area. Turn the petcock to off. Allow the engine to cool down completely. 2. Loosen the fender tab bolt on the back of t... Read More »

Q: What is a rocker box on a harley davidson?
A: Rocker boxes house the heads, cams, valve springs and rocker arms. Read More »

Q: Why is the front rocker box tapping loud on a 2000 harley road ki...
A: Have you had any engine work or head work done? Installed bigger valves or roller rockers? If so, the rocker boxes need to be clearanced. Read More »

Q: What is the trick to removing the rear rocker box assembly on a 1...
A: The cylinder you are working must be at TOP DEAD CENTER COMPRESSION.this is crucial as to relieve valve spring tension on the rocker arms so you dont warp the b... Read More »